Pressure cooker regulator



FIG. 1 is a top plan view of a pressure cooker regulator showing our new design;

FIG. 2 is a side elevational view thereof, the side opposite being identical thereto;

FIG. 3 is an end elevational view thereof, the end opposite being identical thereto; and

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a pressure cooker regulator, substantially as shown and described. 